Message-ID: <20150219155345.54713ultwqjbtrsp@horde.inescporto.pt> (sfid-20150219_155933_931495_00F2831B)
Date: Thu, 19 Feb 2015 15:53:45 +0100
From: =?iso-8859-1?b?TeFyaW8=?= Lopes <mjlopes@inescporto.pt>
To: linux-wireless@vger.kernel.org
Subject: Issue with frame injection on monitor interface (ath9k)
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Sender: linux-wireless-owner@vger.kernel.org

Hi everyone.

When using frame injection over monitor interface, with handmade  
packet with Radiotap header + QoS + Data, at sender I capture the  
packet with tcpdump and it is equal to the one I sent.
Although, at receiver station, the packet is diferent, FCS was  
recalculated or forced to active and calculated, MCS is not the one I  
supplied, sequence number (QoS field) is not the same, amongst other  
things.
Also, QoS Ack policy was "No Ack" at sender (QoS Control = 0x0020), a  
Ack frame was transmitted to sender and the received packet arrived  
with QoS Control = 0x0000.

Tested with Microtik R52n-M (AR9220) on following operating systems:
- AP-STA using Ubuntu Ubuntu 14.04.1 LTS;
- AdHoc using OpenWRT r43000, with kmod-ath9k version  
3.10.49+2014-11-04-1 and kmod-mac80211 version 3.10.49+2014-11-04-1.

Regarding to OpenWRT, this malfunction was reported here:  
https://dev.openwrt.org/ticket/18913

Thanks.


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